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Find cheap United Airlines flights to St. Louis

RDU — STL
26 Aug — 2 Sep1
1 adult
1 adult, Economy, 0 bags

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Cheapest United Airlines flights from Canada to St. Louis
Explore the most affordable United Airlines flight options available from Canada to St. Louis. Find the lowest fares with prices last updated on 27 July 2026.

Sun 30/86:00 a.m.
YYC
-
STL
1 stop16h 31m
United Airlines
Mon 31/84:40 p.m.
STL
-
YYC
1 stop6h 08m
United Airlines
Deal found 26/7C$ 547
Wed 19/89:45 p.m.
YVR
-
STL
2 stops21h 01m
United Airlines
Tue 25/89:00 a.m.
STL
-
YVR
1 stop14h 55m
United Airlines
Deal found 22/7C$ 552
Wed 19/87:00 a.m.
YVR
-
STL
1 stop9h 39m
United Airlines
Sun 30/89:00 a.m.
STL
-
YVR
1 stop15h 56m
United Airlines
Deal found 23/7C$ 585

Flights to St. Louis with United Airlines at a glance

Find detailed information about United Airlines flights from Canada to St. Louis. Explore the options provided by United Airlines to plan your journey from Canada to St. Louis. Data last updated 27 July 2026.

Popular in

March

Cheapest in

July

Average price

C$ 587

Round-trip from

C$ 461

One-way from

C$ 221
Highest demand for flights to St. Louis with United Airlines; 4% potential price increase.
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Best time to find cheap flights to St. Louis with United Airlines; 3% potential price drop.
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Average price for flights to St. Louis with United Airlines (round-trip).
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United Airlines
  • United Airlines
  • 10/10-20/10
  • 2 total stops
  • 15h 10m total
  • Canada to St. Louis
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United Airlines
  • United Airlines
  • 10/10
  • 1 total stop
  • 8h 20m total
  • Canada to St. Louis
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Cheapflights Insights

Find cheap United Airlines flights to St. Louis

How long is the flight to St. Louis with United Airlines?

On average, United Airlines flights from Canada to St. Louis take 5 hours 39 minutes. Flights to St. Louis from other popular cities in Canada will vary in length. Below are a few examples of popular routes and their flight times.

United Airlines weekly flight availability to St. Louis

The most flights to St. Louis operated by United Airlines are scheduled on a Monday (3 on average). You will have fewer flight options on Thursday, which is when the least amount of flights are scheduled (2 on average).

FAQs about flights to St. Louis with United Airlines

  • Which airport do United Airlines flights arrive at when travelling to St. Louis?

    United Airlines flights on this route tend to land at Lambert-St Louis Airport.

  • Is United Airlines the cheapest airline for a flight to St. Louis?

    Flight prices will depend on factors like date, time, and cabin class, so it is worth comparing flights before booking. Based on Cheapflights data, the cheapest average round-trip price for flights to St. Louis tends to be with Delta.

  • Are there alternative airlines other than United Airlines that fly to St. Louis?

    Air Canada, WestJet and Delta all fly to St. Louis and offer an alternative to United Airlines.

  • How much is a flight to St. Louis with United Airlines?

    The average price for a round-trip with United Airlines is C$ 708, while a one-way flight costs around C$ 378.

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Reviews of United Airlines

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United Airlines
7.4
Good
10,000 reviews
Check prices
Overview

Comfort

7.3

Entertainment

7.1

Food

6.6

Crew

8.1

Boarding

7.7

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